My bantam hen has been sitting on her eggs for 2 weeks non stop. she would only leave for a few minutes to join the rest of the chickens to eat and drink and then go back to her hide-a-way nest in the garage. today she never went back to her nest....she stayed with the other chickens in the coop. what should I do ..if anything...with the eggs she abandoned? can i put them under a heat lamp? I dont have an incubator??